hyatt



No Model.)

J. W. 11111J.1j; T 1v-J. 111111111111111. PROCESS 0F, MAKING SOLID COMPOUNDS PROM SOLUBLBNITRO CBLLULOSE.

No. 326,119. pigmented sept. 15, 1885.

N. PETERS. PhowLllwgnphr. washingmn. D. C,

UNITED. Siu/iras PATENT OFFICE.

JOHN W. HYATT AND JOHN EVERDING, OF NEVARK, N. J., ASSIGNORS TO THE CELLULOIDf MANUFACTURING COMPANY, OF NEW YORK, N. Y.

PROCESS OF MAKING SOLiD COMPOUNDS FROM SOLUBLE NlTiO-CELLULOSE.

JPECZ'IFICATION forming part of Letters Patent No. 326,119, dated September 15, 1885.

(No model.)

To @ZZ whom it may concern:

Be it known that we, JOHN W. HYATT and JOHN EvERniNG, both of the `city of Newark, in the county of Essex and State of New Jersey, have invented new and useful Improvements in the Process of Making Solid Compounds from Soluble Nitro-Cellulose, of which the following is a specification.

Our invention relates to a new process for making solid compounds from soluble nitrocellulose by Iirst treating the nitro-cellulose with spirits of camphor or other solvents, and afterward by heat and pressure, as Well known in the art; but our invention relates more especially to that part of the process where the solvents are mixed with the nitro cellulose.

It is awell-known fact that it-has heretofore been practically impossible to mix the nitrocellulose or pyroxyline with spirits of camphor, so as to produce good and uniform results, and it has always been attended with a serious waste of the solvents employed.

The object of ourinvention is to provide an apparatus wherein the pyroxyline pulp can be thoroughly and successfully mixed with the proper quantity of solvents.

To this end our improvements consist in introducing the solvent, in the form of a spray, in a cylindrical vessel which is partly lled with the pyroxyline pulp, and provided with a rotary sweep or agitator for the purpose of stirring up the mass. The pyroxyline isflrst ground into a pulp in an ordinary beatingengine or pulp-mill, and itis then dried in an isolated building on account of the infiammable character of the material. When thoroughly dried, it is taken in small lots or batches to the mixing apparatus shown in the accompanying drawings, of whichy Figure l is a transverse section of the apparatus, an outside view of the pump which supplies the solvent, and a vertical central section through the tank containing the solvents; and Fig. 2,a central longitudinal section ofthe apparatus embodying our improvements.

Ais a cylindrical vessel with the ends closed and made in halves, the lower half being mounted in suitable supports, A A. This vessel contains la sweep or frame, B, provided with trunnions B B', and rotated by means of a pulley, B2, in bearings A2A2, which are part of and pass through the center of the cylinder A. IThe outer edges of the frame B are provided with a number of projections or teeth, b b b, which mesh and correspond with stationary teeth a a a, secured to the inner periphery of the cylinder A. A finely-perforated pipe or sprinkler, G, passes through one of the trunnions B', and is held in a central position bya recess or bearing in the opposite end of the revolving frame B. The solvents are supplied tothis pipe bya pump, D, which is drawn from a crank-shaft, D. Theaction of the pump is coincident with the revolving frame B, both receiving their motion from the main shaft F.

In order to regulate the quantity of solvents to be supplied to the spray-pipe C, the stroke of the pump may be lengthened or shortened by moving the crank-pin toward or from the center of the crank-shaft, or any other snitable means. The pump is connected with atank,E,whicl1 'contains the solvents, by a pipe, e; and to prevent any foreign substance fromV passing through the pump and obstructing the open- Avided with a large opening and corresponding door, -to permit the introduction of the pyroxyline pulp and the removal of the mass when thoroughly mixed.

The operation isas follows: The cylinderA is partly filled with the dry pyroxyline pulp, closed, and the agitator and pump set in inotion. After the proper quantity of the solvent has been injected by the pump the agitator is kept running a short time, until the mass is thoroughly mixed. The mass is then removed from the cylinder and placed in an air-tight box for a period of two to three days, when it is ready for conversion in masticating-rolls or otherwise, as required.

We prefer to construct the apparatus as shown and described; but it is obvious thatit may be changed or modified without d epm-ting` from the spirit of the invention-as, for i11- stance, the VesselV Containing the pyroXyline pulpinay be a tumbling-barrel; or, in other words, the vessel may be made to revolve around a stationary sweep or agitator; or the machine may be so constructed that the cylinder and agitator revolvein opposite directions.

l. A machine for mixing pyroxyline in a finely-divided state with spirits of camphor or other solvents, consisting of the combination of a vessel wherein the pulp is stirred, substantially as described, and a perforated pipe or sprinkler by whiohthe solvents are sprayed upon the pyroxyline pulp, substantially as described.

2. In a machine for mixing pyroxyline pulp with spirits of camphor or other solvents, a 3o Cylindrical vessel to be partly filled With pyroXyline pulp, a sweep or agitator for stirring up the pulp, and a spraypipe or sprinkler supplied' by a pump, substantially as described.

Y JOHN W. HYATT. JOHN EVERDIN G. lvitnesses:

EDWARD RUssELL, TrioMAs HUNT. 

